<?php

/**
 * @package php-font-lib
 * @link    http://php-font-lib.googlecode.com/
 * @author  Fabien M�nager <fabien.menager@gmail.com>
 * @license http://www.gnu.org/copyleft/lesser.html GNU Lesser General Public License
 * @version $Id: font_table_head.cls.php 34 2011-10-23 13:53:25Z fabien.menager $
 */

/**
 * `head` font table.
 * 
 * @package php-font-lib
 */
class Font_Table_head extends Font_Table {

    protected $def = array(
        "tableVersion" => self::Fixed,
        "fontRevision" => self::Fixed,
        "checkSumAdjustment" => self::uint32,
        "magicNumber" => self::uint32,
        "flags" => self::uint16,
        "unitsPerEm" => self::uint16,
        "created" => self::longDateTime,
        "modified" => self::longDateTime,
        "xMin" => self::FWord,
        "yMin" => self::FWord,
        "xMax" => self::FWord,
        "yMax" => self::FWord,
        "macStyle" => self::uint16,
        "lowestRecPPEM" => self::uint16,
        "fontDirectionHint" => self::int16,
        "indexToLocFormat" => self::int16,
        "glyphDataFormat" => self::int16,
    );

    protected function _parse() {
        parent::_parse();

        if ($this->data["magicNumber"] != 0x5F0F3CF5) {
            throw new Exception("Incorrect magic number (" . dechex($this->data["magicNumber"]) . ")");
        }
    }

}